The Hespori is a sporadic boss. In order to fight it, players must first plant a Hespori seed in the Hespori patch within the west wing of the Farming Guild, which requires level 65 Farming to access. It takes 22-32 hours to grow, depending on when it was planted. When fully grown, the flower behind the cave entrance will sprout open.

According to Arno, the Hespori is a rare carnivorous plant originating from Morytania, becoming conscious and highly aggressive once fully grown. The Hespori's appearance is also extremely similar to that of The Maiden of Sugadinti, and it has been confirmed that there is a possible link between the two[1].

The fight with the Hespori is instanced; if the player dies during the fight, lost items will be kept by Arno, which they can reclaim for a fee of 25,000 coins. Note that if the player dies a second time anywhere without reclaiming the items Arno is holding, they will be permanently lost, unless the death occurs within a safe minigame, such as the Nightmare Zone.

There are four flower buds surrounding the patch. The flowers will open up three times during the fight: once upon starting, again after the Hespori reaches below 66% of its health, and a final time after it reaches below 33% of its health. They have 10 hitpoints each and always die in one hit. The Hespori cannot be attacked while any of them are open, so you must subdue all of them before the Hespori can be harmed.

The Hespori can attack with both magic and ranged. The magic attack's animation looks like the Hespori is twirling around, and can hit up to 14, while the ranged attack has the Hespori swinging its arms and throwing green spores at the player, and can hit twice for up to 8 each time. Protection prayers will not completely negate the damage, but will greatly reduce it.

The Hespori will sometimes bind you with roots similar to the entangle spell, rendering you unable to move or attack. When you are rooted, click repeatedly on the floor, preferably the square next to you, or on the Hespori to try and struggle free until you can move and attack again. The chatbox will notify you when you become entangled and when you free yourself. If you don't free yourself in time, the vines will break on their own and hit you for a maximum of over 40 damage. The Hespori can also poison you, so bringing an antipoison or better (or simply drinking a dose before the fight) is recommended.

Once the Hespori is defeated, players must clear the patch with a spade in order to obtain their loot. Players may leave the lair after this point and come back without having to do the fight again.

The best melee setup consists of armour, generally Barrows equipment or Bandos armour with high ranged defence and high strength bonus, with a good slash weapon, such as a dragon scimitar or abyssal whip, at high melee stats (60+ recommended). Protect from Magic should be activated as this is your lowest defence, not ranged. Alternatively, a setup high in both ranged and magic defence can be sufficient, but you will be eating a lot more food this way, as the Hespori will attack you with both combat styles. Eight pieces of food—monkfish or better - will suffice, along with an antipoison, spade, and a prayer potion. To speed up the kills, you can bring a (super) combat potion/super set and/or use melee-boosting prayers like Piety. It's recommended to bring a ranged weapon, like cheap darts, to easily kill the flowers, they always die in one hit.

The player will have one roll on each of the two drop tables: anima seeds and normal seeds. The normal seed table also contains the bottomless compost bucket, which can hold up to 10,000 compost of any kind. In addition, it has a chance to give the Tangleroot pet as a tertiary drop.

↑Range is the chance from 65 to 99. The chance increases with the player's Farming level, and is calculated with the formula 1 in B - (Lvl * 25), where B is the base chance (7000 for Hespori) and Lvl is the player's Farming level. For more information, see: Tangleroot.

↑Jagex. Mod Ash's Twitter account. 13 January 2019. Mod Ash: "[The Hespori bears a striking resemblance to the Maiden from TOB. It's also a plant from Morytania. Is there a possible link between the two?] Yes :)"

↑ 2.02.12.2Jagex. Mod Munro's Twitter account. 13 Feb 2019. (Archived from the original on 25 Mar 2019.) Mod Munro: "As I mentioned on the Q & A, here are the pictures of the drop rates for various parts of Kebos. This time with the correct drop rate for the pieces of the Brimstone Ring."